added new spec for checking inbox pagination after loading all messages

[fcvakintos]

This PR contains tests for checking inbox pagination after loading all messages

covered this case:

1. open Inbox screen
2. check number of messages (should be 20)
3. scroll to the bottom to load next page
4. check number of messages (should be more than 20)
5. scroll to the top of the list and perform pull-to-refresh
6. check number of messages (should be 20)
7. scroll to the bottom to load next page
8. check number of messages (should be more than 20)

close #1288

issue #1366

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Tests

• Tests added or updated

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To be filled by reviewers

I have reviewed that this PR... (tick whichever items you personally focused on during this review):

• addresses the issue it closes (if any)
• code is readable and understandable
• is accompanied with tests, or tests are not needed
• is free of vulnerabilities
• is documented clearly and usefully, or doesn't need documentation

[fcvakintos]

@sosnovsky new aid is not working

[fcvakintos]

@sosnovsky we can use this one **/XCUIElementTypeTable[name == "aid-inbox-list"]/XCUIElementTypeCell

[sosnovsky]

@sosnovsky we can use this one **/XCUIElementTypeTable[name == "aid-inbox-list"]/XCUIElementTypeCell

I tried this selector, but it didn't work for me, so I returned your initial one.